Country Namibia, Karibib
Machines RM 90GO! und RM MS95GO!
Material White marble
Feed material -500 mm
Final aggregate 0-15, 15-30, 30-45mm
Average troughput 240 t/h
Application Fassaden & Dekoration für Landschaftsgestaltung
AGGREGATES BUSINESS article Link to article

Franz Wittreich senior, a trained stonemason, was born in Bad Tölz, Germany. In 1980 he decided to emigrate to Namibia, where he saw better opportunities for his career: “At the end of the 1980s my neighbour gave me the idea of extracting marble on his property. That was the start of Namagra (Pty) Ltd. That this product, now known as White Rhino marble, would be so successful, was something I could only dream about at the time.”

Following Franz Wittreich senior being granted mining rights on a piece of land about 20 km south of Karibib, he headed on a steep course of success. Today, White Rhino marble – which is sourced in Namibia along with other types of marble – is internationally renowned for its aesthetics and hardness. Within Namibia, Namagra (Pty) Ltd. is the sole owner of the quarrying rights for the internationally registered Namibia White Rhino™.

In order to expand the business model and increase the sales figures in the future, Franz Peter Wittreich junior – who took over management of the firm in 2015 – decided years later to offer the waste material from slab cutting for further processing. After Namagra (Pty) Ltd. tried initially to produce the desired end product with a jaw crusher, they then decided in favour of the mobile RM 90GO! crusher. “This RUBBLE MASTER crusher unit is exactly what we were looking for. We placed our trust in the decades of expertise of the Austrian manufacturer as well as in the great advice on site and were not disappointed”, says Franz Wittreich senior, delighted. When RM sales partner Pilot Crushtec International (Pty) Ltd. demonstrated the RM 90GO! to him, the native German from Bad Tölz was particularly impressed by the performance, effectiveness and cuboid shape of the final aggregate. During the first weeks of operation, the RM crusher unit achieved an impressive throughput of 240 t/h and less than 5% oversize aggregate while crushing the material, which has a density of 2.875 t/m³.

The eye-catching and hard-wearing white marble aggregate (15-30, 30-45 mm) is often used as decoration in landscaping, especially in South Africa. With an 88% degree of whiteness, White Rhino marble dust (0-15 mm) is used as an additive product in paving stones, tiles and concrete and is often sold to paint and facade companies.

Our crushers in action

RM 90GO!

Leistungsstark und rentabel – diese Eigenschaften beschreiben den RM 90GO! am besten. Vielseitig wie er ist, verwandelt er jedes mineralische Material zu hochwertigem kubischen Endkorn, bis zu 200 t/h. Dank seiner Mobilität ist er sowohl in der Innenstadt als auch im Bergland im Einsatz.


Die optimierte Prallschwingengeometrie und der für die Anwendung angepasste mobile Brecher von RM sorgen beim Brechen von hartem Gestein nicht nur für hohen Durchsatz, sondern erzeugen auch ein höchst qualitatives Endkorn. Dabei bleiben die Verschleißkosten bei Granit, Basalt oder anderen Har

Contact us for more information

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+43 732 73 71 17 – 0

Natural rock

Crushing at a high output and low wear, and that in every possible and impossible location, is not an issue for RM crushers. They manage to generate the highest quality value grain from natural stone on site. Depending on the desired combination of machinery. The end result is always cubic aggregate.

Abrasive rock

Quartz gravel, granite and riverbed gravel are not easy to process because high levels of quartz cause high wear. However, RM crushers are designed for such materials: thanks to their compact size they can achieve high throughputs even in tight spaces, producing valuable aggregate directly on site at all times.

Schrefler relies on RM hybrid crusher

Demolition work and mobile recycling have been part of Manfred Schrefler’s range of services since 2016; previously he was known primarily for transport and earthwork. In terms of machinery, the Upper Austrian relies on top quality and always has the very latest technology.

Basalt preparation

Crushed basalt is used for a variety of purposes. Most often, it is crushed to be used as an aggregate in construction projects.

Increase in orders with cuboid final aggregate

In Mexico the RM 100GO! replaces a jaw and cone crusher combination. Basalt with a diameter of up to 500 mm is crushed into different sizes of cuboid final aggregate, which is then reused for asphalt production. Final aggregate grades between 0-19 and 0 25 mm are processed to a high standard without any problems.

RM 70GO! 2.0 crushes hard river basalt

The first mobile RM crusher in Gorontalo, Indonesia, has been in operation since spring 2017. The new RM 70GO! 2.0 replaces several machines at once: instead of using the jaw crusher combined with a cone crusher, this mobile crusher unit processes extremely hard river basalt in a single pass.